Look at that... Two of Schwinn's crappy aluminum bikes in one week. I had a 564 (the black one) as my first racing bike - It was terrible. It was both heavy and uncomfortable. The Exage level parts all broke quickly and I was constantly fixing it. I upgraded to a steel Italian frame and could not believe the difference.

I understand they sold the same frame as different models, all the way up to Paramount level with different component packages.